Print ISSN: 1815-316X

Online ISSN: 2224-9796

Keywords : Flow time


ROLE OF WATER IRRIGATION ON POTASSIUM RELEASE IN SOME CALCAREUS SOILS OF NORTHERN IRAQ

A. Alhadede

Mesopotamia Journal of Agriculture, 2018, Volume 46, Issue 1, Pages 59-66
DOI: 10.33899/magrj.2018.161417

A laboratory study was conducted to determine the effect of irrigation water quality on capacity and rate of potassium release in some calcareous soils in Nineveh province. It was constructed by miscible displacement technique with natural un disturbed soil columns using chlorine and sulfuric water of two different textured soils from location of Zummar of clayey and Sheikh Mohammed of loamy silt texture for ten irrigation epochs on the basis of porosity volume (PV). Results indicated for presence values of desorbed potassium rate with increase of porosity volumes passed through soil columns. Sulfuric water caused more desorption of potassium in comparison with chlorine water. Desorption capacity rate were 1.93, 2.92 c.mole.kg-1 for Sheikh Mohammed and Zummar locations respectively by using sulfuric water, while desorbed potassium by using chlorine water for the same Soils were 1.12, 2.01 c.mole.kg-1. Mathematical description for desorption process appeared harmony of diffusion equation, power function equation, first order equation, zero order equation, while Elovitch equation did not describe desorption process with the same efficiency. K+ desorption rate due to diffusion equation by using chlorine water were 0.06, 1.2 c.mole.kg-1.min for the Soil of Sheikh Mohammed and Zummar locations respectively, yet using sulfuric water increased desorption rate which were 0.14, 0.22 c.mole.kg-1.min for the same locations respectively.

EFFECT OF WATER IRRIGATION QUALITY ON POTASSIUM DESORPTION IN SOME CALCAREOUS SOILS IN NINEVH PROVINCE

Mohammed Khalil

Mesopotamia Journal of Agriculture, 2017, Volume 45, Issue 2, Pages 169-178
DOI: 10.33899/magrj.2019.161310

A laboratory study was conducted to determine the effect of irrigation water quality on potassium desorption in some calcareous soils. It was constructed by miscible displacement technique using chlorine and sulfuric water via two different textured soils from Fadhlia and Hamdania locations in Nineveh province / northern Iraq for 240 minute with 10 minutes interval at a rate flow 1 ml.minute-1. Results showed higher values of desorbed potassium rate in sulfuric water which were 3.57, 2.128 c.mole.kg-1, while these rates referred to be much lower than that resulted by using chlorine water 2.25, 1.15 c.mole.kg-1 for both locations respectively. Also high correlation appeared between K+ desorption capacity and flow time (R2 = 0.96 , R2 = 0.79) for both water qualities in Fadhlia location , while these rates were (R2 = 0.98, R2 = 0.95) for Hamdania location respectively. Mathematical description for diffusion equation appeared to be of higher values of K+ desorption capacity rates for sulfuric water which were 0.26, 0.13 c.mole.kg-1.min. for Fadhlia and Hamdania locations respectively, while these rates for chlorine water were 0.146, 0.048 c.mole.kg-1.min. for both locations respectively.